Window scaffold



March 20, 1928. v 1,663,279

B. A. PORTT WINDOW SCAFFOLD 7 Filed May 7. 1926 z Sheets-Sheet 1 Q /V [a I jnvoxn fo'z I Ezra/14%)? March 20, 1928.

1,663,279 8. A. PORTT wmnow SCAFFOLD Filed lflay 7b 1 2 2 Sheets-Sheet 2 Patented Mar. 20, 1928.

Barton s. were, or BAY cirviiviioiireiinl wmnow SCAFFOIJDi Application filed May 7,

This invention relates to window scaffolds and the like, and particularly: .to .an' ad uSts able scaffold whiclican be fitted to the different One object of the invention 1 sizes and shapes of sills.-

s to design a bracket having a spring tensionedsection.

which section is adapted toxbe compressed by the projecting portion of 'thesill to permit of the face of the bracket resting firmly against the face of thevwallz. v

Another object of the inventionis to desi gn a scaffold whichczinbe quickly iLSSIDw bled or folded, which isconvenienttoguse. and Wl11Cl1 1S economical'to manufacture'and assemble.

means urther. object isito provide adjustable whereby the brackets can be adjust,-

ed. with. relation to the :side .bars,..so' that the scafiold can be fitted to any wall of reasonable width. I A

Astill. further object is to provide adjustable. felt faced blocks for. contact with the window casing to prevent the marring thereof;

' VViththe above;and otherjobjectsin view a the present invention consists in the combination; and arrangement of parts, hereinafter more fully described, illustratednin the accompanying drawings, and particularly pointed out in the appended claims,.it being understood that changes may be-made in the form, constr spirit size, proportiona'n'd minor details of notion, Without departing from the or sacrificing any of the advantages of the invention.

In the drawings:

Fig.

1 is a sectional view through a win dow, showing my improved scaffold assembled and in position.

Fig Fig 2 is a top plan view thereof. 3 1s an enlarged sectional View, showing the method of fastening the cross bar to the Fig side bars. 4 is also an enlarged sectional View showing the relation of the platform and side railings and the method of securing the side b Fig ars. 5 is a transverse sectional view through one of the cushioning blocks.

Fig

Fig

. 6 is a side view thereof. 7 is an enlarged side View of one of the brackets.

Fig F g Fig 8 is a top plan view thereof. 9 is an edge view. 10 is a fragmentary side view of one 1926. Serial No. 107,337.

'ofithe" side; bars and? brackets, the bracket is .limited, and on -which' the, footing, is; v,

OfiZtlIDP/S insecure, and I have therefore ,de:

signed a foldable, adjustable scaffold which can be quickly set up. and which willbe safe and convenient to use; g ,1; .i Referring now. particularly to the drawings in which I have sliownthe preferred embodiment of my inventi n, the numeral 1; indicates. a conventional; window frame, set in a wall 2 in the usual manner, a sill 3 be sr 'o i ed as shown! The .scafiold proper consists of a ,p'air ofv side bars:.,4- inwhich suitable, T-shaped groovesor ways -5 are formed, and Which'are eachadapted to slidably receive the toothed i portionf6 of a wall bracket 7, said bracket being formed with a? downwardly project-f ingle'gf which comprises spaced Y apart plates,

of the drawings, the upper ends of said plates being secured to the upper portion 6 by means of rivets 9. A vertically disposed I cutaway as shown at? 8,-'-and separated by;

means of suitable spacers shown in Fig. 10

bar 10 is slidably mounted in the opening 8,

the ends being received between the wall sections of the bracket. A pair of spaced apart pins 11 are rigidly secured to this bar, the free ends being slidably mounted in open ings 12 provided in the bracket, coiled springs 13 being mounted on these pins, and are interposed between the vertically disposed bar 10 and the plate 7 said plate being .securedbetween the side Walls of the bracket in any approved manner, and is provided with spaced apart opening 7 through which the pin members 11 project, the

- springs serving to yieldingly force the bar outwardly and against the sill.

A platform 14 is adapted to be removably mounted on. these side bars 4, and is provided with spaced apart elongated grooves 1.5 which are adapted to receive the eyebolts 16 anchored in the side bars as shown, the slots permitting the side bars to be adjusted with relation to each other to accommodate a narrow or wide opening as required.

A plate 17 is rigidly secured to the side of each side bar and a bracket 18 projects therefrom, and to which a lever or dog 19 is pivotally connected by means of a pin 20, the one end of the lever being turned and projecting through an opening 21 formed in the side of the side bar and is adapted to engage the toothed side of the bracket 7 for holding it in adjusted position, a flat spring 22 being secured to the plate 17, and engage the under side of the lever 19 for forcing said lever into engagement with one of the teeth on the bracket, and it will be obvious that by forcing the lever inwardly that the bracket can be adjusted in the side bar as desired. 7

A cross bar 23 connects the inner. ends of the side bars, and is slotted as shown at 24, being adapted to receive the bolt 25 which is anchored in the side bar as cleariy shown in Fig. 3 of the drawings, a wing nut 26 serving to clamp the members in position, the inner edge of the bar 23 is grooved as shown at 27 and is adapted to slidably receive the shoulder 28 of the block 29, the face of which is padded with felt 30 or similar material for contact with the window casing or wall.

Detachable side frames or railings 31 are secured to the platform and comprise upper and lower members 32 and 33 connected by means of stiles 34, a pin 35 projecting through the end of the frame as clearly shown in Fig. 12 of the drawings, a. clip 36 being anchored in the bottom rail of the frame and engaging the eyebo-lt 16 which is anchored in the side bar, the end closure or frame (not shown) being made up of conventional foldable rick-rack. Suitable handles 37 are secured to the side bars as shown and are convenient in assembling and handling the device.

There is considerable diiierence in the projection of sills on various buildings and this is easily accommodated by the compressible bar 10, which permits the sill to extend into the opening 8, also the scaffold is easily adjusted as to width, the padded blocks eliminating marring, and the device is quickly and easily assembled or disassembled.

From the foregoing description it will be obvious that I have perfected a very simple and convenient-adjustable scaffold for use by window cleaners, and other persons who work on building openings, which are at a distance from the ground.

hat I claim is 1. A. window scaffold comprising a slotted platform, grooved side bars, Wall brackets adjustably engaging said side bars and each having a spring tensioned section intermediate the length of the bracket, a transversely disposed bar connecting the inner ends of the side bars and provided with a grooved edge, and padded blocks mounted in said groove.

2. A Window scaffold comprising a slotted platform having a detachable railing mounted thereon, grooved side bars, toothed wall brackets adjustably mounted in said grooves and spring tensioned dogs on the side bars and engaging said teeth, a transversely disposed slotted bar connecting the inner ends of the side bars, a groove in one edge thereof, and padded blocks slidably mounted in said groove.

In testimony whereof I affix my signature.

BYRON A. PORTT. 

